Add google assistant (#140)

Add an optional extended description…

google_assistant/Dockerfile

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+#armhf:FROM multiarch/debian-debootstrap:armhf-stretch
+#amd64:FROM multiarch/debian-debootstrap:amd64-stretch
+
+# Install packages
+RUN apt-get update \
+    && apt-get install -y python3 python3-dev python3-pip \
+        python3-six python3-pyasn1 libportaudio2 \
+    && pip3 install google-assistant-library google-auth \
+    && apt-get remove -y --purge python3-pip python3-dev \
+    && apt autoremove -y \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy data
+COPY run.sh /
+COPY hassio_gassistant.py /
+COPY asoundrc /root/.asoundrc
+
+RUN chmod a+x /run.sh
+
+ENTRYPOINT [ "/run.sh" ]

google_assistant/asoundrc

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+pcm.!default {
+  type asym
+  capture.pcm "mic"
+  playback.pcm "speaker"
+}
+pcm.mic {
+  type plug
+  slave {
+    pcm "hw:%%MIC%%"
+  }
+}
+pcm.speaker {
+  type plug
+  slave {
+    pcm "hw:%%SPEAKER%%"
+  }
+}

google_assistant/config.json

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+{
+  "name": "Google Assistant",
+  "version": "0.0.3",
+  "slug": "google_assistant",
+  "description": "A virtual personal assistant developed by Google",
+  "url": "https://home-assistant.io/addons/google_assistant/",
+  "startup": "application",
+  "boot": "auto",
+  "arch": ["armhf", "amd64"],
+  "map": ["share"],
+  "devices": ["/dev/snd:/dev/snd:rwm"],
+  "options": {
+    "mic": "0,0",
+    "speaker": "1,0",
+    "service_account": "service_account.json"
+  },
+  "schema": {
+    "mic": "str",
+    "speaker": "str",
+    "service_account": "str"
+  },
+  "image": "homeassistant/{arch}-addon-google_assistant"
+}

google_assistant/hassio_gassistant.py

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+"""Hass.IO Google Assistant."""
+import sys
+
+from google.assistant.library import Assistant
+from google.assistant.library.event import EventType
+
+from google.oauth2 import service_account
+
+
+def process_event(event):
+    if event.type == EventType.ON_CONVERSATION_TURN_STARTED:
+        print()
+
+    print(event)
+
+    if (event.type == EventType.ON_CONVERSATION_TURN_FINISHED and event.args and not event.args['with_follow_on_turn']):
+        print()
+
+
+if __name__ == '__main__':
+    credentials = service_account.Credentials.from_service_account_file(sys.argv[1])
+    scoped_credentials = credentials.with_scopes(['https://www.googleapis.com/auth/assistant-sdk-prototype'])
+
+    with Assistant(scoped_credentials) as assistant:
+        for event in assistant.start():
+            process_event(event)

google_assistant/run.sh

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+#!/bin/bash
+set -e
+
+CONFIG_PATH=/data/options.json
+OAUTH_JSON=/data/auth.json
+
+SERVICE_ACCOUNT=$(jq --raw-output '.service_account' $CONFIG_PATH)
+SPEAKER=$(jq --raw-output '.speaker' $CONFIG_PATH)
+MIC=$(jq --raw-output '.mic' $CONFIG_PATH)
+
+echo "[Info] Show audio device"
+aplay -l
+
+echo "[Info] Setup audio device"
+sed -i "s/%%SPEAKER%%/$SPEAKER/g" /root/.asoundrc
+sed -i "s/%%MIC%%/$MIC/g" /root/.asoundrc
+
+# check if a new assistant file exists
+if [ -f "/share/$SERVICE_ACCOUNT" ]; then
+    echo "[Info] Install/Update service account key file"
+    cp -f "/share/$SERVICE_ACCOUNT" "$OAUTH_JSON"
+fi
+
+exec python3 /hassio_gassistant.py "$OAUTH_JSON" < /dev/null